If you refer to someone as a man of his word or a woman of her word , you mean that they always keep their promises and can be relied on.
give a person his or her due
to give or allow a person what is deserved or right
give someone his or her head
to allow a person greater freedom or responsibility
all his or her geese are swans
he or she constantly exaggerates the importance of a person or thing
put someone in his or her place
to humble someone who is arrogant , conceited , forward, etc
take someone at his or her word
to assume that someone means, or will do, what he or she says
bring someone to his or her knees
to force someone into submission
man (or woman) of his (or her) word
a person who keeps his (or her) promises
put someone through his or her paces
to test the ability of someone
send someone about his or her business
to dismiss or get rid of someone
walk a person off his or her feet
to make someone walk so fast or far that he or she is exhausted
his or her bark is worse than his or her bite
he or she is bad-tempered but harmless
a man of his years/a woman of her years
You can say a man of his years or a woman of her years to refer to that person's age in relation to something else you are talking about.
leave someone to his or her own devices
to leave someone alone to do as he or she wishes
meet someone on his or her own ground
to meet someone according to terms he or she has laid down himself or herself
pay someone back in his or her own coin
to treat a person in the way that he or she has treated others
Your Excellency His Excellency Her Excellency
You use expressions such as Your Excellency or Her Excellency when you are addressing or referring to officials of very high rank, for example ambassadors or governors .
give someone a dose of his or her own medicine
to repay or punish a person for an injury by use of the offender's own methods
make someone turn (over) in his (or her) grave
to be or do something that would have shocked or distressed someone now dead